Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc8a5a8ddb5ab90a…

MALICIOUS

PDF

97.3 KB Created: 2021-03-21 08:09:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: afe19ac25a63292133f9916b691c2393 SHA-1: 59069ac15f797eda8a42fc46789deaaf9f4ad842 SHA-256: dc8a5a8ddb5ab90a251a5daa142427a2b9db16173587c1a3c5ee6c22becd1727
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://dafemum.ru/strik?utm_term=free+2001+vw+beetle+owners+manual+pdf PDF link annotation
    • http://liwexun.mywebcommunity.org/a_beginners_guide_to_python_3_programming.pdfIn PDF document text
    • http://cookwellbakewell.com/20441144237efw31.pdfIn PDF document text
    • http://1xbets-regs.site/the_ones_who_walk_away_from_omelas_criticism_of_utilitarianismvow54.pdfIn PDF document text
    • http://speak4pro.com/calabozos_y_dragones_5ta_edicionneg34.pdfIn PDF document text
    • http://goxivomibivufuv.mywebcommunity.org/balance_sheet_in_accounting.pdfIn PDF document text
    • http://joweponula.mywebcommunity.org/factoring_gcf_and_difference_of_perfect_squares_worksheet.pdfIn PDF document text
    • http://inter-kalinka.ru/ffxiv_chocobo_training_manualz3pus.pdfIn PDF document text
    • http://mbfsopg.com/69076590048cig8k.pdfIn PDF document text
    • http://itali-big.space/nozunetizogirahpcbw.pdfIn PDF document text
    • http://crysety.xyz/67835080639kv2e9.pdfIn PDF document text
    • http://reduslim-buy.site/53666972977qio4i.pdfIn PDF document text
    • http://sodahub.pro/kemuleseguribikutepi14zpg.pdfIn PDF document text
    • http://gomunawuwox.22web.org/vebusejareterixaw.pdfIn PDF document text
    • http://fabulouss.space/descargar_mi_calendario_menstrual_apkrb2zu.pdfIn PDF document text
    • http://usejus.pro/919808311023zbrq.pdfIn PDF document text
    • http://zuzavepojul.mygamesonline.org/70520539812.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://3a00e800-a8eb-44ae-aafc-ae9aecab8e06.filesusr.com/ugd/1715bf_2303c801701a430b84f228a146e102c2.pdf?index=trueIn PDF document text
    • http://vovakupalujum.onlinewebshop.net/the_dark_song_movie_trailer.pdfIn PDF document text
    • http://foxadawimuwewar.epizy.com/25003895153.pdfIn PDF document text
    • https://e29a9437-b0a5-48a6-9afa-908397ce514a.filesusr.com/ugd/16a9c1_d72d9bdb9f1a4cb89eeb6dd261b5a669.pdf?index=trueIn PDF document text
    • http://finuzajobozosom.epizy.com/gefuvogoni.pdfIn PDF document text
    • http://rusozetowozo.epizy.com/ich_guidelines_investigator_brochure.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000117fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117FE 5596 bytes
SHA-256: ad3b454069cf401c8d6caae2b2347ad10928163d4dfec2a083e035e8267d05a0
font_01_sfnt_off00012af7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AF7 11412 bytes
SHA-256: 36622f3a454e76dc5ad79a2f2ebbca5df4b98e0a8dea8be4b27cc4324b0adb6a
font_02_sfnt_off0001526b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1526B 16204 bytes
SHA-256: e93acd332f5893643511f4cefd38969ad5c744ad1b08842a788b6be7d277dd15
font_03_sfnt_off00016799.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16799 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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